I don't know which dress to choose... I want a long one so I can hide my tights and boots, but I hav…

I don't know which dress to choose... I want a long one so I can hide my tights and boots, but I haven't decided on the color yet 😅 For my husband, a white shirt, and for my son too, I'm thinking of a black bottom. I haven't figured out what to get for my daughter and myself... The envelope will be powder pink, or closer to purple... Basically, if I don't manage to buy everything and get it ready, I'll just show up in sweatpants 😅 It's not every day you get discharged, so I want to dress festively))